You get a B if you know it's the most common volcanic rock in the Earth's crust

1.0JeopardyAnswers.orghttps://jeopardyanswers.orgjeohttps://jeopardyanswers.org/author/jeo/You get a B if you know it's the most common volcanic rock in the Earth's crust - JeopardyAnswers.orgrich600338<blockquote class="wp-embedded-content" data-secret="ou7V5fsCgn"><a href="https://jeopardyanswers.org/you-get-a-b-if-you-know-its-the-most-common-volcanic-rock-in-the-earths-crust/">You get a B if you know it's the most common volcanic rock in the Earth's crust</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://jeopardyanswers.org/you-get-a-b-if-you-know-its-the-most-common-volcanic-rock-in-the-earths-crust/embed/#?secret=ou7V5fsCgn" width="600" height="338" title="“You get a B if you know it's the most common volcanic rock in the Earth's crust” — JeopardyAnswers.org" data-secret="ou7V5fsCgn" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); </script> Below you may find the You get a B if you know it's the most common volcanic rock in the Earth's crust which is part of the Jeopardy Archive. In case the question or answer is wrong or something is missing do not hesitate to contact us and we will be glad to help you...